NERVES OF THE GROIN. 



GOl 



off an inguinal branch having a similai- course and distribution to the ilio-inguina, 

 neiTes the place of which it supplies. 



Genito-crural nerve. 



The genito-cniral nerve belongs partly to the external genital 

 organs and partly to the thigh. It is derived chiefly from the 



Fig. 367. 



Pig. 367. — View fuom bi;fokk ov the Antekiok Branches of the Lumbar and Sacral 

 Nerves with the Plexuses (from Sappey, after Hirschfield and LeveillG). { 



1, lumbar cord of the great sympathetic nerve ; 2, 2', anterior primary division of the 

 twelfth dorsal nerve ; 3, first lumbar ; 4, 4', ilio-inguinal branch of this nerve ; 5, o', 

 ilio-hypogastric branch ; 6, second lumbar nerve ; 7, 7', genito-cniral nerve rising from 

 the first and second lumbar ; 8, S', external cutaneous nerve of the thigh ; 9, third 

 lumbar nerve; 10, fourth ; 11, fifth; 12, lumbo-saeral trunk; 13, iliac branch of the 

 ilio-inguinal ; 14, its abdominal branch ; 15, its genital branch ; 16, external cutaneous 

 nerve of the right side passing out of the pelvis under Poupart's ligament ; 17, 17, 17, 

 cutaneous ramifications of this nerve ; 17, the same nerve exposed on the left side ; 18, 

 IS', genital branch of the genito-crural ; 19, its crural brauch on the right side becoming 

 cutaneous ; 19', the same on the left side exposed as it descends in front of the femoral 

 artery ; 20, anterior crural nerve ; 21, 21', obturator nerve ; 22, left sciatic plexus; 23, 

 aortic plexus of the sympathetic nerve connected superioily with the other pre-aortic 

 plexuses and the lumbar ganglia, and inferiorly with the superior xdexus. 



